Question

Q18. Show that (x - y) (x + y) +
(y - z) (y + z) + (z - x) (z + x) =
O ​

Answer 1

Step-by-step explanation:

use identity a square - b square to solve

Answer 2

Step-by-step explanation:

(x - y) (x + y) + (y - z) (y + z) + (z - x) (z + x) = 0

x²-y² + y²-z²+z²-x²=0